I believe this is by Cellcom, a Wisconsin based carrier.
Marquette Michigan is not yet included. These areas include locations where Sprint through Clearwire had WiMax sites, the only 4G in the UP for many years.
Extended LTE may not have all the Sprint features, but counts as regular data usage towards your plan. This should mean regular LTE speeds.

Many parts of the UP in Michigan now show extended LTE (perhaps done earlier). Some b41 in Columbus OH metro proper is added plus some Granville, but most outlying b41 done in the last year or so remains MIA. Dayton still outdated.

Same can be said for many new bands. As long as there still is movement on some portions of the border I advise patience, as difficult as it may be. I do wish Sprint would be more forthcoming, but action is best. Sent from my LG-LS997 using Tapatalk

There was a test version of a similar product for IOS but you had to be jailbroken. Field test mode would give similar info. Sometimes you had to change font for all to display. Somewhat flakey. Sent from my LG-LS997 using Tapatalk

You have to talk to a knowledgeable manager and show them your Signal Check Pro screen. Typically hidden in back and they generally won't take a picture of it. I then check CMDA to see if it is an Airave. DkoellerWX likely knows all these tricks.
PS: Sprint is not unique about using signal devices in their stores. I have also seen AT&T and Verizon do the same. I have not been in a T-Mobile store for a decade, although I have referred people to them (I always go with whatever works well in needed areas).

Sprint does have its secret projects.
I thinks Sprint ends up exaggerating enough on its own, primarily due to changed priorities given limited funding. Therefor I am primary focused on what the guy in charge of the money says. And even that is limited to the areas where they figure they can gain market share.

Neighborhoods mentioned by the CFO to me means expansion for suburban sprawl. The last time Sprints network overall was expanded with new sites was back when Clearwire was putting in Wimax sites - and even that was not allowed to finish (thus leaving coverage gaps). Even areas with no population growth have continued to expand. Growth in the south and west and places like Washington DC, Minneapolis, Columbus have outpaced the Sprint network. B26 LTE 800 helped but more needs to be done. When people arrive in their new neighborhood they should see good Sprint signal, else they might change carriers. Waiting several years means lost customers. Getting people to return is hard work and often not possible.

Transcript of CFO talk yesterday: https://seekingalpha.com/article/4129858-sprint-s-45th-annual-ubs-global-media-communications-brokers-conference-transcript
He identified the main priority as execution. Sprint has many plans, but often the money is not there to implement as priorities shift. I don't get too excited until I actually see the beginnings of a project in the field.

Sprint CFO Tarek Robbiati @ 45th Annual Global Media and Communications Conference
All Q&A
Sprint priorities for 2018: on execution - network rollout, customer experience, distribution.
decisions to invest in network was made before merger talks.
we will triband a lot of our towers.
2.5 now on 50% of tower. expansion is #1
2) add a few new towers in specific neighborhoods (a few thousand)
3) will be aggressive about rolling out massive mimo 64x64
4) small cell densification: mini macros, air strands, magic boxes
5-6 billion next next, and then same level for a few more years
*year
small cells: have obtained several thousand small cell permits. Altice as well which includes reasonable backhaul.
looking at markets where they can really gain share first
1100 company owned retail stores at the end of June
then 360 stores via Radio Shack, 200 via car warehouse, 200 new Sprint
improving the customer experience: have analytical model for churn score - relates highly to network quality. Now looking at other churn factors such as customer care.
churn has improved this quarter
churn is always a local issue
Sprint seems to be changing its tune on how they address price? they intend to remain price leader. raised prices in the last few weeks and may again.
iphone x short supply limited promotions
arpu is higher than t-mobile. will be offering new services to raise arpu
what is driving people into the Sprint stores? we will go deeper in markets where we feel that we have the networks up to scratch
in 9 quarters we have cut 9 billion in costs. now is the time to rebalance cost cuts with reinvestments.
*5 billion
more into IT to improve customer experience
really critical that we put our spectrum to use once and for all
cash flow should be around break even except next year
will be doing the second traunch of spectrum lease co, and another spectrum financing
will be doing the same with devices
arm and satellite LTE mentioned as futures. Marcello is in Japan. pro and cons of staying public. happy where we are. done.

Purging or averaging data for the same location given same gci pci etc has reduced data quite a bit for me in the past. Worse case you can go with a sample method, ie every 3 row etc or parition your data. Sent from my LG-LS997 using Tapatalk

Over time Sprint has grown less conservative with guard bands (and/or our understanding is greater). In some of our earlier calculations we were giving CDMA 0.625 guard bands and 10% internal to each side for LTE bands. They certainly have packed 1x800 more closely with 3x3 and channel 526 as a case it point. You are correct that Sprint may ultimately be able to have several CDMA channels with almost no effect on LTE. This is assuming that current 1900 RRH firmware is able to be adjusted to support larger bandwidth LTE while still supporting CDMA for places like Columbus. Maximizing LTE will get more interesting for some Shentel locations like Marietta, OH - Parkersburg, WV which will soon have 10x10 and 20x20 as one network to play with as per their April 2017 expansion agreement. CDMA capabilities with 5G radios may be more of an issue longer term, in addition to volumes needed to support CDMA existing in future smartphones.

You are correct. Despite remembering that I saw it on a chart in the background of a photo, I am unable to find that now or any reference to 2018 in press releases. They could have been cleaned-up, but more likely my memory is faulty or search methods are deficient.